Ore drying and pulverizing apparatus



(No Model.)

J. K. HALLOWELL. 0KB DRYING- AND PULVERIZING- APPARATUS.

No. 447,028. Patented Feb. 24, 1891.

'2 8 I F F! I &

mi l a z a a UNITED STATES JOHN K. IIALLOVELL, OF CAMDEN, NElV JERSEY.

ORE DRYING AND PULVERIZING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 447,028,6lated. February 24, 1891.

Application filed June 13, 1888. Serial No. 277,024. (No model.)

To all whom, it may concern.-

Be it known that 1, JOHN K. HALLOWELL, a citizen of the United States, and a resident of Camden, in the county of Camden and State of New Jersey, have invented a certain new, useful, and Improved Ore Drying and Pulverizing Apparatus, of which the following is a specification.

material while it is being ground, thereby eliminating the moisture and greatly enhancing the brittleness of the material.

The apparatus forming my invention is represented in sectional elevationin the accompanying drawing, and following is a description thereof, the mechanism being housed in a suitable inclosure, (building) as indicated.

A is a pulverizer, of any suitable con-struction, having a desired number of inlets e for cold air, and which, to that end, should communicate with the surrounding atmosphere, but which communication should, for a purpose hereinafter explained, be controllable, as by providing the inlets with adjustable caps 6, preferably secured permanently to the inlet -pipes by latching. The pipes 6 form branches, near the pulverizing-machine, of hot-air inlet-passages Z), leading into the machine, preferably at opposite sides thereof, as shown, as branches from the main hot-air conduit a. A suitable hopper 2', extending above a floor forming in the inclosure the compartment in which the mechanism of my apparatus is in the main contained, communicates with the machine A, as shown, through a pipe j, and affords means through which to feed to the machine the material to be pulverized according to my improved method.

The conduit a, which is closed at the end nearest the pulverizing-machine A, leads to the latter through its branches 1) from the opening 72. or hand-hole atthe base of the chimney and forming a passage f.

At intervals along a horizontally-extending portion of the conduit a it is provided with pockets (1, preferably of the hopper shape illustrated, each being provided with a slidevalve, as shown, forming the removable closure for its base. Adjacent to each pocket, at the farther side thereof in the conduit a, and

also near the end thereof where it communicates with the chimney, I provide a Wire-screen damper c.

The operation is as follows: The ore or other rock material to be pulverized is fed to the machine A through the hopper 2, While hot air f rom. the chimney is simultaneously'forced into the machine by way of the conduit or and its branches Z), the cold-air inlets e being normally closed and the hot products of combustion from the furnace escaping into the chimney B, and thence directed into the conduit a by controlling the escape thereof from the top of the chimney through the medium of a cover or damper k, hinged to be extended over the top of the chimney and controlled from a rope Z or the like extending from it into accessible position. Thus while the material fed to the machine A is undergoing the reducing effect of its pulverizing action the waste heated air willbe drawn through the pulverizing-machine and into such thorough and intimate contact with the material as to evaporate and absorb the moisture therein and carry it off in its escape with the comminuted material.

The screens 0 in the conduit a serve to intercept mattersuch as soot, chimney-dust, and the like-that may enter the conduit from the furnace with the hot air, and the pockets d receive the accumulations of such intercepted matter, which may be readily emptied as often as required on pulling out the sliding bottoms of the pockets. Vhatever of such matter is intercepted at the first screen c, located nearest the chimney, will drop intothe space f, whence the accumulation thereof may be removed from time to time through the opening h. 7

Should at any time the heat introduced by the hot air through the pipes a and Z) into the pulverizing-machine A be too great, its temperature may be reduced or it may be cut off entirely by opening to the desired extent the .chimney at its top by raising the damper 7t, removing the covers of the cold-air inlet e to let cold air into the machine, and shutting off to the desired extent comm unication between the conduit athrough the branches bwith the pnlverizer by adjusting to that end the sliding dampers m.

The draftthrough-the pulverizirig-machine 'may'readily'be increased to any desired degree byattac'hing any suitable suction appliiancc-suchas a fan-to its discharge; butmy apparatus does notnecessarily depend for its efficacy on such provision, and for that reason and :for the further reason'thatan attachment of the kind will be readily understood by those skilled in the art to which my improvement relates without illustration it is :not shown in the accompanying drawin F 0111 the foregoing description it will be quite apparent that by my improved apparatus the disintegrating property of the ma :teria'l'to be-pulverized may be very considerably andeconomically enhanced, therebyalso materially increasing the capacity of thepulverizingmachine and reducing the wear thereon, for the reason that dry brittle rock material is disintegrated .much more readily, rapidly, and perfectly than the same material when moist.

By means of my improvement it is quite feasible to dry-pulverize ore by passing it directly from a Wet mine through the pulveriz'ing -machine, thereby affording great economy in the working of the mine.

hat I claim as new, and desire to secure by Letters Patent, is

1. In an apparatus for simultaneously drying and pulverizing triturable material, the combination of a pulverizing-machine A, a furnace having a chimney B, and a conduit to, connecting the pulverizing-machine with the chimney and containing one or more pockets cl and screens a, substantially as described.

2. In an apparatus for simultaneously drying and pulverizing triturable material, the combination of a pulverizing-machine A, a furnace having a chimney B, provided with a false partition g, forminga passage f, open near its base, a conduit a, connecting the pulvcrizing-machine with the chimney and provided with one or more pockets (Z, and-screens c in the conduit near its communication with :the chimney and near each of said pockets,

substantially as described.

3. 111a machine for simultaneously drying and pulverizing triturable material, the combination of apulverizing-machine A, having controllable air-inlets e, a furnace having a chimney B, and a conduit a, leading from the chimney and having branches 1) leading into the pulverizing-machine, substantially as described.

4. In a machine forsimultaneously drying and pulverizing triturable material, the :combination of a pulverizing-machine A, having controllable air-inlets .e, a furnace having a chimney B, provided with a false partition 9, forming a passage f, open near its base, a damper 71') at the upper end of the chimney, a conduit a, leading from the chimney and provided with pockets (1 and internal screens 0, and branches 1), leading from the conduit into the pulverizing-machine and provided With dampers m, the whole beingconstructed and arranged to operate substantially as described.

JOHN K. HALLOWVELL.

XVitnesses:

F. G. FAXON,

CHAS. W. PILE. 

